5-alarm fire breaks out at Riverside apartment building

RIVERSIDE, Calif. (KABC) -- Crews battled a five-alarm fire at an abandoned apartment building in Riverside on Sunday.

The fire broke out in a second-story apartment at the Monte Vista Terrace apartments, located in the 2400 block of Market Street around 4:30 p.m., fire officials said. The unoccupied building is listed as a senior living facility.

When firefighters first arrived, they say they attempted to fight the flames from the inside, but were quickly forced to evacuate as the fire grew.

The fire was upgraded from a four-alarm fire to a five alarm fire in the 9 p.m. hour. By 11 p.m., crews had the flames under control. They were expected to remain on scene through the night.

No injuries were immediately reported. A cause of the fire was not immediately known.

CNS contributed to this report.